Help Please! Lamona Electric Oven Cooling Fan Runs Constantly

5
Posted 16th Jun
RE LAMONA LAM3401 Single Built Under Electric Oven

I have switched the oven spur on. Upon inspection, the unit powers up and no error codes are displayed. The Cooling Fan runs continuously even though there is no heat. The main oven fan is functioning correctly.

After isolating the appliance from the supply and removed from oven housing unit. I dissembled and removed the top and rear thermostats.

Top thermostat is N120 tested with a multimeter for continuity, the result yes for continuity.

Rear thermostat is N130 tested with a multimeter for continuity, the result is yes for continuity.

Are these parts faulty or functioning correctly? Should they read community?

What parts do I need to further test or replace to resolve this issue,

Please see photos attached,

Many Thanks in advance. Any help is greatly appreciated.
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5 Comments
Can you check the resistance at room temperature for both stats? Disconnect them and measure resistance between the terminals
Edited by: "Dannyrobbo" 16th Jun
Dannyrobbo16/06/2020 17:07

Can you check the resistance at room temperature for both stats? …Can you check the resistance at room temperature for both stats? Disconnect them and measure resistance between the terminals


Hi Danny,

I have checked both stats for continunity and the machine beebs each time.
Dannyrobbo16/06/2020 17:07

Can you check the resistance at room temperature for both stats? …Can you check the resistance at room temperature for both stats? Disconnect them and measure resistance between the terminals


I did test it with a multimeter and the resistance for each one dropped off to zero?

Any ideas thanks?
Kevlar.Engineer16/06/2020 22:27

I did test it with a multimeter and the resistance for each one dropped …I did test it with a multimeter and the resistance for each one dropped off to zero?Any ideas thanks?



ignore the resistance then, now I’ve seen the photos it’s not measuring temp and is just an on off switch type stat. Anyway you can heat the stat up and see if they switch?

or start the oven, verify the fan is on. Turn off oven and disconnect a stat. See if fan stops.

I’m struggling to find info on if it should be normally closed or open. I suspect these are both functional and closed switches at room temp but it would be a start to check them by applying heat that they do switch.

also those images you have sent are just single temp switches, you will find a temperature adjustable stat in there. This would not give continuity but you’d be looking for a room temp resistance value of 1100 ohms ish. That could also run a fan. Does the oven heat to temp okay?

after that sometimes the control board relays fail.

also the switch model is written on the black plastic but I can’t make both of them out. One is nt-101-2s what’s the other?
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